The BodyTrack project seeks to help people working to track down suspected environment/health interactions (food sensitivities, asthma or migraine triggers, sleep problems, etc.). In many cases, simple medical tests to identify sensitivities and triggers do not yet exist, leaving people to try to discover through a trial-and-error approach involving cycles of hypothesis generation, modification of inputs, introspection, and evaluation. Keeping track of everything that's potentially important is a real challenge, and we believe that better tools